From: Jakub Jirutka <jakub@jirutka.cz>
Date: Sun, 18 Dec 2022 19:43:00 +0100
Subject: [PATCH] Add support for cjson

--- a/src/cliargs/config_loader.lua
+++ b/src/cliargs/config_loader.lua
@@ -36,14 +36,16 @@
 
   --- Load configuration from a JSON file.
   ---
-  --- Requires the "dkjson"[1] module to be present on the system. Get it with:
+  --- Requires the "cjson"[1] or "dkjson"[2] module to be present on the system. Get it with:
   ---
-  ---     luarocks install dkjson
+  ---     luarocks install cjson
   ---
-  --- [1] http://dkolf.de/src/dkjson-lua.fsl/home
+  --- [1] https://www.kyne.com.au/~mark/software/lua-cjson.php
+  --- [2] http://dkolf.de/src/dkjson-lua.fsl/home
   from_json = function(filepath)
     local src, config, _, err
-    local json = require 'dkjson'
+    local ok, json = pcall(require, 'cjson')
+    if not ok then json = require 'dkjson' end
 
     src, err = read_file(filepath)